초록 ▼

A flexible zipper intended for use in a package containing powder or other particulate matter. The zipper is designed to be resistant to clogging of the interlocking profiles with powder. This flexible zipper has first and second profiles that interlock in a closed zipper state to define a space the

A flexible zipper intended for use in a package containing powder or other particulate matter. The zipper is designed to be resistant to clogging of the interlocking profiles with powder. This flexible zipper has first and second profiles that interlock in a closed zipper state to define a space therebetween. The space extends in a longitudinal direction, i.e., along the length of the zipper. The bases of both profiles are provided with apertures for enabling powder or other particulate matter trapped in the space between the profiles to pass into the interior volume of a package.

대표청구항 ▼

1. A flexible zipper comprising first and second zipper parts, said first zipper part comprising a first base, and first and second generally hook-shaped profiled members projecting from one side of said first base, having respective profiles that are substantially constant along the entire length o

1. A flexible zipper comprising first and second zipper parts, said first zipper part comprising a first base, and first and second generally hook-shaped profiled members projecting from one side of said first base, having respective profiles that are substantially constant along the entire length of said first zipper part and disposed generally parallel to each other with a first space therebetween, and said second zipper part comprising a second base, and third and fourth generally hook-shaped profiled members projecting from one side of said second base, having respective profiles that are substantially constant along the entire length of said second zipper part and disposed generally parallel to each other with a second space therebetween, each of said first through fourth profiled members having only one detent projecting from one side of its distal end, said first and second profiled members being respectively interlockable with said third and fourth profiled members to close said zipper, said interlocked profiled members and said first and second bases defining a zipper internal volume, wherein said first base comprises a first plurality of apertures that form communication pathways from said zipper internal volume to a volume on another side of said first base, the entirety of each aperture of said first plurality being disposed between said first and second generally hook-shaped profiled members, and each aperture of said first plurality having a dimension along a line parallel to a lengthwise direction of said first zipper part that is less than the length of said first zipper part.2. The zipper as recited in claim 1, wherein said detents of each said first and second profiled members point away from each other, while said detents of said third and fourth profiled members point toward each other, said detents of said first and second profiled members being disposed between said third and fourth profiled members when the zipper is closed.3. The zipper as recited in claim 1, wherein said detents of each said first and second profiled members point in a first direction, while said detents of said third and fourth profiled members point in a second direction generally opposite to said first direction, said detent of said first profiled member being disposed between said third and fourth profiled members when the zipper is closed, and said fourth profiled member being disposed between said first and second profiled members when the zipper is closed.4. The zipper as recited in claim 1, wherein said second base comprises a second plurality of apertures that form communication pathways from said zipper internal volume on another side of said second base.5. The zipper as recited in claim 2, further comprising a post projecting from a portion of said second base located between said third and fourth profiled members, said post being disposed between said first and second profiled members when the zipper is closed.6. A package comprising:a structure made of web material defining a receptacle having an interior volume and a mouth at an upper end thereof; anda flexible zipper attached to said web material at said mouth and comprising first and second zipper parts, said first zipper part comprising a first base, and first and second generally hook-shaped profiled members projecting from one side of said first base and disposed generally parallel to each other with a first space therebetween, and said second zipper part comprising a second base, and third and fourth generally hook-shaped profiled members projecting from one side of said second base and disposed generally parallel to each other with a second space therebetween, each of said first through fourth generally hook-shaped profiled members having only one detent projecting from one side of its distal end, said first and second profiled members being respectively interlockable with said third and fourth profiled members to close said zipper, said interlocked profiled members and said first and second bases defining a zipper internal volume that extends along the length of said first and second profiled members,wherein said first base comprises a first plurality of apertures that form a first set of communication pathways from said zipper internal volume to said interior volume of said receptacle, the entirety of each aperture of said first plurality being disposed between said first and second generally hook-shaped profiled members.7. The package as recited in claim 6, wherein said first plurality of apertures are arranged along a length of said first zipper part with respective spaces between successive apertures.8. The package as recited in claim 6, wherein said detents of said first and second profiled members point away from each other, while said detents of said third and fourth profiled members point toward each other, said detents of said first and second profiled members being disposed between said third and fourth profiled members when the zipper is closed.9. The package as recited in claim 6, wherein said detents of said first and second profiled members have hook-shaped profiles with respective detents that point in a first direction, while said detents of said third and fourth profiled members have hook-shaped profiles with respective detents that point in a second direction generally opposite to said first direction, said detent of said first profiled member being disposed between said third and fourth profiled members when the zipper is closed, and said fourth profiled member being disposed between said first and second profiled members when the zipper is closed.10. The package as recited in claim 6, wherein said second base comprises a second plurality of apertures that form a second set of communication pathways from said zipper internal volume to said interior volume of said receptacle, the entirety of each aperture of said first plurality being disposed between said third and fourth generally hook-shaped profiled members.11. The package as recited in claim 8, wherein said zipper further comprises a post projecting from a portion of said second base located between said third and fourth profiled members, said post being disposed between said first and second profiled members when the zipper is closed.12. The package as recited in claim 6, wherein said first base comprises a first extension flange, while said second base comprises a second extension flange, said first and second base extension flanges being joined to said mouth of said receptacle.13. A flexible zipper comprising a length of a first zipper strip and a substantially equal length of a second zipper strip, said first and second zipper strips being interlockable with each other along their length,said first zipper strip comprising a first base having a first plurality of apertures disposed entirely within a first zone thereof, and first and second projections disposed generally parallel to each other along said length, each aperture of said first plurality having a dimension along a line parallel to a lengthwise direction of said first zipper part that is less than the length of said first zipper part, and each of said first and second projections projecting along the entire length of said first zipper strip with a respective substantially constant profile and with only one detent projecting from one side of its distal end, said first projection projecting on one side of said first base from a second zone of said first base while said second projection projects on said one side of said first base from a third zone of said first base, said first zone of said first base being between said second and third zones of said first base; andsaid second zipper strip comprising a second base having a second plurality of apertures disposed entirely within a first zone of said second base, and third and fourth projections disposed generally parallel to each other along said length, each aperture of said second plurality having a dimension along a line parallel to a lengthwise direction of said second zipper part that is less than the length of said second zipper part, and each of said third and fourth projections projecting along the entire length of said second zipper strip with a respective substantially constant profile and with only one detent projecting from one side of its distal end, said third projection projecting on one side of said second base from a second zone of said second base while said fourth projection projects on said one side of said second base from a third zone of said second base, said first zone of said second base being between said second and third zones of said second base;wherein said first and second projections are interlocked with said third and fourth projections when said zipper is closed, and are not interlocked with said third and fourth projections when said zipper is opened.14. The zipper as recited in claim 13, wherein said detents of said first and second projections point away from each other, while said detents of said third and fourth projections point toward each other, said detents of said first and second projections being disposed between said third and fourth projections when the zipper is closed.15. The zipper as recited in claim 13, wherein said detents of said first and second projections point in a first direction, while said detents of said third and fourth projections point in a second direction generally opposite to said first direction, said detent of said first projection being disposed between said third and fourth projections when the zipper is closed, and said fourth projection being disposed between said first and second projections when the zipper is closed.16. The zipper as recited in claim 13, further comprising a post projecting from a portion of said second base located between said third and fourth projections, said post being disposed between said first and second projections when the zipper is closed.17. A package comprising:a receptacle having an interior volume and a mouth at an upper end thereof, said receptacle comprising front and rear walls, said mouth being formed by respective portions of said first and second walls; anda flexible zipper comprising a length of a first zipper strip and a substantially equal length of a second zipper strip, said first and second zipper strips being respectively attached to said respective portions of said first and second walls and being interlockable with each other along said length,said first zipper strip comprising a first base and first and second projections disposed in parallel along said length, said first base comprising a first plurality of apertures entirely disposed between said first and second projections and further comprising a first extension flange joined to said portion of said first wall; andsaid second zipper strip comprising a second base and third and fourth projections disposed in parallel along said length, said second base comprising a second plurality of apertures between said third and fourth projections and further comprising a second extension flange joined to said portion of said second wall,wherein said first through fourth projections are located within said interior volume of said receptacle, and said first and second pluralities of apertures allow a space between and bounded by said first and second zipper strips to communicate with said interior volume of said receptacle.18. The package as recited in claim 17, wherein said detents of said first and second projections point away from each other, while said detents of said third and fourth projections point toward each other, said detents of said first and second projections being disposed between said third and fourth projections when the zipper is closed.19. The package as recited in claim 17, wherein said detents of said first and second projections point in a first direction, while said detents of said third and fourth projections point in a second direction generally opposite to said first direction, said detent of said first profiled member being disposed between said third and fourth profiled members when the zipper is closed, and said fourth profiled member being disposed between said first and second profiled members when the zipper is closed.20. The package as recited in claim 17, wherein said zipper further comprises a post projecting from a portion of said second base located between said third and fourth projections, said post being disposed between said first and second projections when the zipper is closed.